Machine and method for winding electrical coils



July a7, 1923. 11,462,032

' H. C. EGERTON MACHINE AND METHOD FOR WINDING ELECTRICAL COILS Filed Dec. 29, 1920 5 pered on the coil, but the cotton Patented duly 17, 1923.

NET

HENRY c. nene'ron, or PASSAIC, NEW JERSEY.- ass're von 'ro -WESTERN Emma COMPANY, INCOPORATED, OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK.

IJIACHINE AND METHOD FOR WINDING ELECTRICAL COILS.

Application med December 29, 1920. Serial a... 433,756.

T aZlwh-om it mag/,concerfit Be it known the lg- 1 HENRY a citizen-of the Uiiited Passaic, in the county of Passaic, State of New Jersey, have invented certain new and useful Improvements in Machines and Methods for inding Electrical Coils, of which the following is a full, clear, concise, and exact description,

This invention relates 'to machines and methods for winding electrical coils.

In the construction of induction coils it is well known that a considerable saving can beobtained if the iron core is allowed to ex- C. EcEn'roN,

i tend out past the ends of the coil since, of

.course, fewer .turns of wireare required than when the windings cover the entire core. It has been found that a highly ef' ficient coil is produced and that a further saving is effected if the wire is tapered so that there are fewer turns at each end of the coil, the number gradually. increasing toward the center; or 1n other words, so thatthere are a greater number of turns on the inside layer, this number decreasing toward the outer layer. p

It is one object of the invention to provide apparatus for winding, a coil of thistype, in which acotton binding thread and the wire are wound simultaneously, the number ofturns per layer being subjected to-automatic control.

In the preferred form of the invention, there is provided a main shaft carrying an arbor for winding the coil and a cam belted to ten serving, the feed of the wire being controlled by a lathe screw. The proper number of turns per layer is determined by employing a drum which will be stepped placing of contact plugs in the drum, the.

number of turns per layer may be controlled. The wire. as has been noted, is tais allowed to feed constantly across the coil and is allowed to build up at each end to form a spool head intended to strengthen the me chanical structure of the coil.

The invention will be better understood States, residing at spindle 3 for is controlled by the shaft to'control the feed of cot-.

1 idler pinion to rotate in a 24. It will thus be seen shaft 19 from a consideration of the following description taken'in connection with the accompanying drawing and the appended claims.

Referring to the drawing in the preferred form of the invention, a main shaft 1, adapted to be driven by any suitable means, such as a motor 2, is provided with an arbor or winding the coil. A cam 4, adapted to control thefeed of cotton from the spool 5 is belted to the shaft 1 by means of the wheel- 6 and belt 7. A bar 8, pivotally mounted on the supporting plate 9, mounts a roller 10 which is held in engagement in the slot 11 of the cam 4. An arm 12 is provided, one end on the bar 8, the opposite end containing a bolt 13 which is-adjustably mounted in the vertical slot 14 of the guide plate 15. The fibf'ous insulating material passes from the spool 5 over the guiding roller 16, and is served through the eyelet 17 of the guide 'plate 15 upon the arbor 3. It will be seen that by adjusting the bolt 13 in theslot 14: the distance 'over which the cotton is served may be adjusted in accordance with the length of the coil required. Y g

The feed of the wire from the spool 18 a lathe screw feed consistof the threaded shaft 19 and the feed ing portion of member 20, the inner tubular which is threaded to of the shaft. The guide member 21is adapted to hold the feed member 20 from rotating ,with the shaft 19. On the inain shaft 1 are mounted the pinions o r cog-wheels 22 and 23, the teeth ofthe pinion 23 engaging the teeth ofan idler pinion 24 causing the said to the rotation of the shaft 1, as indicated by the arrows in the drawing. The shaft 19 is provided with a pinion or wheel 25,

'-and the said shaft is slidably mounted so engage either thti that the wheel 25 may wheel 22 of the main shaft 1, or the whee that when the wheel 25 is in operable engagement with the wheel 22, the shaft 19 will rotate in a direction oposite to the rotation of the shaft 1, and the eed member 20 will move from left to right along the threaded portion of the shaft 19. When, however, the pinion 25' is in operable engagement with the idler pinion 24, the will rotate in the same direction as the shaft 1, and the'feed member 20 will,

of which is pivoted direction opposite I engage similar. threads move from right to left along the shaft 19.- The wire from the spool 18 passes over the guide roller 26 and is served through the eyelet 27- of the feed member 20 upon whatthe drum 30. The spiral converging contact plugs, those on one end of the drum 30 be ing indicated by the numeral 31, and those such a way that when either contact 28 or on the opposite end by the numeral 32, are so spaced on the drum 30 as to indicate the proper number of turns of wire perlay er in the coil under construction. The reversing mechanism is operated by the ele ctromagnets 33 and 34, the pivoted arma ture '35 ofvwhich is forked at one end to engage the circular slot 36 of the shaft 19.

' The contacts 28 and 29, as well as. the contact plugs 31 and 32, are connected in oircuit with the electromagnets 33 and 34 in 29 makes, a t-the end of each travel, with either contacts 31 or 32, one of the said electromagnets will be'energized to attract the'armature 35. As this is done, the position of the pinion 25 on the shaft 19 willbe shifted, and the feed of wire reversed. An electromagnet 37 is provided to control the rotation of the drum 30, the end of the armature 38 being adapted to engage the teeth of ratchet wheel 39 of the drum 30. The electromagnet 37 is so connected that every time the above-mentioned contacts make to reverse the feed, current from battery 40, which operates windings 33 and 34, also energizes the windings of electromagnet 37 to attract armature 38; which action steps around the drum 30 one position. V

With the arrangement here shown and described, in which the feed of the wire is constant, the change in the difierent' layers 1s accomplished by timing the reverse. Thus the core may conthe layer of'wire nearest tain a great many turns; each succeeding layer of wire, however, will contain fewer turns of wire, the number of turns being controlled by the predetermined position of the plug contacts'31 and 32 of the drum 30.

No attempt has been made to change the eed of the cotton, because if this is allowed to feed constantly across the coil, the cotton will build up at each end and form a sort of spool head which will tend to strengthen the mechanical construction of the coil.

A disk member might, of course, be sub-- stituted for the drum 30, and certain other changes in the construction of the device as herein described may obviously be made.

It is therefore not intended'to limit the invention to the construction shown except within the scope of'the appended claims,

adapted for engage What is claimed is said drum and adapted to control thB SGIV- 111g of the wire upon said arbor, an electromagnet, an armature for said elect-romagnet,

and means associated with said feed member adapted to contact with said drum contacts to cause said armature to step around sa d -drum. c 2. In a coil winding machine, a rotatable arbor, an adjustably mounted rotatable shaft, a feed member disposed on said shaft and adapted to'act as a guide for the wire, a contact mounted on said feed member, a rotatable drum member, a'plurality of contacts mounted. on said drum member and ment with said feed contact, and means wlfereby the engagement of said feed contact with any of said drum contacts will serve to adjust theposition of said shaft.

- 3. In a coil winding machine, a drum, a plurality of contacts mounted on said drum, a rotatable arbor, afeed member adapted to act as a guide for serving wire upon saidarbor, reversing mechanism for said feed member, a contact carried by said feed member, and means for operating said reversing mechanism upon engagement of said feed and drum contacts.

4. The method of producing electrical coils which consists in simultaneously winding conducting material and insulating material in superimposed layers, the conducting material being wound so that there are a greater number of turns on the inside jlayer, this number decreasing toward the outer layer, and the insulating material bemg wound continuously across the coil, each succeeding layer containing substantially the same number of turns as the layer below it.

5. The

method of producing electrical machine, a rotatable coils which consists in simultaneously interweaving conducting material and insulating material in superimposed layers, the conducting material being wound so that there are a greater number of turns on the inside layer,- outer layer, and the insulating material being wound continuously across thecoil each succeeding layer containing substantially the same number of turns as the layer below it.

6.;A coil winding machine comprising a rotatable shaft, anarbor mounted on said shaft, a second rotatable shaft 'slidably mounted so that it may rotate with the first shaft-or in an opposite direction thereto according to its 7 position, a feed member mounted on said second shaft and adapted this number decreasing toward the control said reversing mechanism, a rotatable drum member, a plurality of spirally.

to travel thereon to act as a guide for serving conducting material upon said arbor,

a contact carried by said feed member, a rotatable drum member, a plurality of contact plugs mounted 'on said drum member and-adapted for engagement'with said feed contact, an electromagnet connected in circuit with said feed contact, and said 00ntactplugs, an armature for said electromagnet, one end of-said armature being in' v engagement with said second shaft, whereby when the circuit including said contacts is closed, the said-armature will be attracted rotate in the opposite direction. I 7. In a coil winding machine, an arbor,

meansfor rotating said arbor, meansfor serving fibrous insulating material upon said arbor, a lathe screw feed'comprisinga rotatable shaft and a feed member for a upon rotation of said shaft, a reversing mechanism to control the direction of travel of said feed member, a reversingmagnet to wlre guide adapted to travel upon said shaft' to shift the position of said second shaft to.-

cause theushaft to converging contacts mounted onsaiddrum member, a contact carried by the said feed member. and adapted to contact with said drum contacts to operate said reversing magnet, and a stepping magnet adapted to change the position of said rotatable drum upon the operation of said reversing magnet.

8. A coil winding machine comprising a rotatable arbor, IIIQHJISjfOI' serving insulating material and wire simultaneously upon said arbor, means for obtaining a uniform number of turns of insulating material on each layer, andmeans whereby the number of'turns of wire may. automatically decreased with each succeeding layer.

9. A coil winding machine comprising a ENR o. nennron. 

